EP 3343921 B1 20220413 - METHOD AND DEVICE FOR DIGITAL DATA COMPRESSION WITH SIGN BIT REMOVAL
Title (en)
METHOD AND DEVICE FOR DIGITAL DATA COMPRESSION WITH SIGN BIT REMOVAL
Title (de)
VERFAHREN UND VORRICHTUNG ZUR DIGITALDATENKOMPRESSION MIT ZEICHENBITENTFERNUNG
Title (fr)
PROCÉDÉ ET DISPOSITIF DE COMPRESSION DE DONNÉES NUMÉRIQUES AVEC ÉLIMINATION DE BITS DE SIGNE
Publication
Application
Priority
US 201615394879 A 20161230
Abstract (en)
[origin: EP3343921A1] The invention provides a method and device for compressing a sequence of signed coefficients wherein coefficients are grouped, for each group, the greatest coded line index (GCLI) is determined, a quantization level t is applied and only the GCLI to t+1 weight bits of the coefficients are copied into the output stream together with the value of the GCLI. According to the invention, sign bits are not coded for coefficient having a zero quantized value. The invention also provides a method for determining a data budget required for compressing a sequence of signed coefficients, in dependence of a quantization level, and a method for compressing an image within the limits of a given data budget constraint. The invention provides a compressed data set coding an image in an efficient way.
IPC 8 full level
H04N 19/132 (2014.01); H04N 19/124 (2014.01); H04N 19/146 (2014.01); H04N 19/18 (2014.01); H04N 19/184 (2014.01); H04N 19/645 (2014.01)
CPC (source: EP US)
H04N 19/12 (2014.11 - US); H04N 19/124 (2014.11 - EP US); H04N 19/132 (2014.11 - EP US); H04N 19/137 (2014.11 - US); H04N 19/146 (2014.11 - EP US); H04N 19/18 (2014.11 - EP US); H04N 19/184 (2014.11 - EP US); H04N 19/423 (2014.11 - US); H04N 19/44 (2014.11 - US); H04N 19/645 (2014.11 - EP US); H04N 19/91 (2014.11 - US)
Citation (examination)
- INTOPIX: "intoPIX Codec Submission for JPEG-XS CfP, Design description V0.1", 73. JPEG MEETING;14-10-2016 - 21-10-2016; CHENGDU; (JOINT PICTURE EXPERT GROUP OR ISO/IEC JTC1/SC29/WG1); URL: HTTPS://WWW.ISO.ORG,, no. wg1m73019, 23 September 2016 (2016-09-23), XP030190195
- "Text of ISO/IEC 21122 WD1 (JPEG XS)", 73. JPEG MEETING;14-10-2016 - 21-10-2016; CHENGDU; (JOINT PICTURE EXPERT GROUP OR ISO/IEC JTC1/SC29/WG1),, no. wg1n73016, 21 October 2016 (2016-10-21), XP030170292
- FRAUNHOFER IIS ET AL: "JPEG XS low complexity coder proposal", 73. JPEG MEETING;14-10-2016 - 21-10-2016; CHENGDU; (JOINT PICTURE EXPERT GROUP OR ISO/IEC JTC1/SC29/WG1); URL: HTTPS://WWW.ISO.ORG,, no. wg1m73018, 23 September 2016 (2016-09-23), XP030190194
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3343921 A1 20180704; EP 3343921 B1 20220413; ES 2921227 T3 20220822; US 10212421 B2 20190219; US 2018192051 A1 20180705
DOCDB simple family (application)
EP 17176196 A 20170615; ES 17176196 T 20170615; US 201615394879 A 20161230